Beegh



(No Model.) l v v H. VAN HOEVENBERGH.

UNISON FR PRINTING TBLEGRAPHS. i

h Patented Apr. 28, 1885.

@Witwe/604,0 I

. UNirEn STATES PAiEivr OEEECE,

HENRY VAN HOEVENBERGH, OF ELIZABETH, NEW JERSEY, ASSIGNOE TO THE BALTIMORE 8u OHIO TELEGRAPH COMPANY, OF BALTIMORE, MD.

l UNISON FOR PRINTINVG-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 316,696, dated April 28, 1885.

' Application ined August 7, iss4. (No model.)

To @ZZ whom it may concern:

Be it known that l, HENRY VEN HOEVEN- BERGI-I, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Unison Devices for Printing-Telegraphs, of which the following is a specification.

My invention relates to the class of devices employed in connection with printingtelegraph instruments for the purpose of maintaining the .typewheels of the receiving-instruments in unison with the transmitting apparatus.

The object of the invention is to provide convenient means for so controlling the position of a unison-arm that it will normally stand out of the path of a unison-stop applied to the type-wheel shaft, but may be caused to intercept the path of the same whenever it is.

so desired.

The invention consists in organizing the apparatus in substantially the following manner: Applied to the type-wheel shaft and a scapewheel of the usual character is an escapementanchor, the to-and-fro movements of which are occasioned by means of two electro-magnets acting upon an inductively-polarized arma-` ture. A pivoted lever or rocker of magnetic material is applied to the extremities of the polarized armature of the escapement-magnets. During the normal operation of the instrument this rocker is not actuated; but it is, however, so adjusted as to respond to theincreased attraction which the escapement-armature is caused to exert when currents of greater than normal strength are employed, such increase in attraction being due to the inductive effects of the electrornagnets upon the escapement-armatnre. -The rocker is so pivoted that if the polarized armature be in one of its two positions when the stronger current is transmitted it will be actuated in one direction. If, however, the polari'zedarmature be in its other position at that time, the rocker will be actuated in the opposite direction. Applied to and moving with this rocker is a unisondetent, which is thus capable of being moved into or out of the path of a stop moving with the type-wheel, accordingly as the rocker is actuated in one direction or the opposite. When, therefore, it is desired to arrest the type-Wheel at its unison-point, it is necessary only to transmit through the escapementmagnets, when the polarized armature is in the proper position with reference to the rocker, a current ofthe last polarity employed and of sufiicient strength to cause the rocker to be actrent not only carries the polarized armature into its second position, but also serves to so actuate the rocker as to Withdraw the detent from the path of the unisonstop. Suitable means are employed for holding the detent in either position which it is caused to assume until it is purposely actuated.

In the accompanying drawings, Figure l is la side elevation of such parts of a printingtelegraph instrument as are required to illus- `trate my invention, and Fig. 2 is an end view jof the same.

Referring to the drawings, A represents a type-wheel shaft,upon which is carried a typewheel, B. A scape-wheel,O, is also mounted upon a typewheel shaft, and to this scapewheelis applied an escapement-anchor, D. The escapernent-anchor is carried upon a shaft or arbor, e, which also carries a polarized armature, E. The polarized armature is designed to be actuated in one direction,and the opposite by means of electric currents of alter- Inating polarity transmitted through two electro-magnets, E' and E2, in a well-known manner. rIhe armature E is preferably polarized by means of a permanent magnet, F, and it consists of two soft-iron sections, f and f2, which are respectively supported at the respective poles of the permanent magnet. The sections f and f2 are thus normally polarized to a certain degree by the permanent magnet, and Will lactuate the shaft or arbor e upon which they are carried in one direction and the opposite in response to 'the alternating currents inthe usual manner. A step-by-step movement of the type-wheel isthus obtained. When,how ever, the armature-sections are adjacent to the poles of one or vthe other of the electromagnets,they will receive therefrom by induction a .certain amount of additional polarization which will be dependent upon the strength of the current transmitted through the electromagnets.

Near the extremities of the two sections f and f2 of the armature there extends a softiron rocker or pivoted lever, H. This rocker is supported at its respective extremities :by means of two pointed screws, 7c and k2, or in any other suitable manner. The parts are so organized that'the armature E will present its extremities to the rocker H upon one side of itsaxis when a current is transmitted th rough the electro-magnets E and Eiin one direction, and. upon the other side of the axis when the current. is transmitted in the opposite vdirection. During the normal operation of the inl strument the armature E is impelled to and fro .without affecting the rocker H, for the reason that the magnetism developed therein is not sufficient to actuate the rocker.. WVhen, however, acurrent of greater than normal strength is transmitted through. the electromagnets, the magnetism which is developed in the armature 4E will be sufficient to attract the rocker H, causing itto turn upon its axis in one direction or the opposite, accordingly as the armature E is toward one or the other of the electro-magnets E or E2. .i

, Applied to the rocker H there is a unisonarm, p,.and this arm carries at its extremitya detent, p", which is designed to normally stand out. of the path of a .unison-stop, 19t-.which lis carried upon the type-wheel shaftA. Vhen,l however, it is desired to arrest the type-wheel atits .unison-point, the detentp is caused to iuterceptthe path of the stop p2. Thenecessary movements of the arm p are obtained from the movement of the rocker H. Thus when it is desired to move the unison-detent p into the path of the stop or arm p. a strong current is transmitted having the character required to hold the armature E towardthe electro-magnet El, and when it is desired to remove the detent from the path of the stop a strong current of the character required to draw the armature E toward the electro-magnet E is transmitted.

`For the purpose of causing the rocker H and` the arm pto normally remain in Whichever position they have been caused to occupy, a spring, r, is employed. In the extremity of thisspring there are` formed two recesses, r and r2, and alpin, r3, carried upon the.- arm p.

falls `into one or the other of thesey two recesses, accordingly as it is away from or in the. path of the unison-stop. The normal attraction. exerted `by the polarized armature lE upon the rocker H will not be sufficient to move the latter in opposition to the'resistance offered by the spring r, but vthe increased magnetism will be sufficient to effect this result.

For the purpose of limiting the movements of the rocker H, suitable adjustable stops, t and t2, may, for convenience, be applied to extensions t3 and t4, of non-magnetic material, which project upward from the opposite sides of the rocker.

I claim as my invention- 1. vThe combination, substantially as hereinbeforeset forth, ,with the type-Wheel and typewheel shaft of a printing-telegraph instrument, ofascape-Wheel and escapement-anchor, a polarized armature and the electro-magnets for actuating the said escapement-anchor, a magnetic lever or rocker applied to said polarized armature, and a unison-stop actuated by said lever or rocker under the influenceof currents of greater than normal strength.-

2. The combination, substantially as hereinbefore set forth,.with the type-Wheel and typewheel shaft of a printing-'telegraph instrument, of an escapement device, a normally-polarized armature andelectro-magnets for actuating said escapement device, a magnetic lever or rocker applied to said polarized armature, means, substantially such as` described, l for actuating said lever or rocker in one direction or the other through the influence ofcurren ts.

of greater thannormal strength, accordingly as they are of one polarity or the opposite,and a unison device actuated by saidV lever or rocker.V U 3. rlhe combination, substantially as hereinbefore set forth, with an escapement ,devicefor printing-telegraph instruments, vof a unison-` stop, a polarized armature 4and` electro-magnets for actuating said escapement device, magnetic lever or rocker applied to said polarized armature, and a unison-"detentv actuated by said lever or rocker.v

4. The combination, substantially as hereinbefore set forth, of the escapement device of-a printing-telegraph instrument,l electro-magnetsand an armature for actuating the same, a permanent magnet serving to normally polarize said armature to a given degree,`a-rocker applied to said` polarized armature,U which rocker is notactuatedby the magnetism normally induced in said polarized armature, and a unison device which is operated through the inliuence of said polarized4 armature :when said electro-magnets are traversed by currents of greater than normal-strength.- l f 5. The combination, substantially as hereinbefore set-forth, with the escapement device-of a printing-telegraph instrument, a polarized armature, and electro-magnets for actuating the same, of a unison device, a lever of magnetic material applied thereto, and means, substantially such as'described, whereby currents of greater than normal strength transmitted through said electro-magnets induce in said IOO plarized armature sufficient magnetism to actuate said unison device through the lever applied thereto.

6. The combination, substantially as hereinbefore set forth, in a prnting-telegraph instrument, of a permanent magnet, a soft-iron eX- tension normally polarized thereby, a softiron lever applied to said extension, means, substantially such as described, for causingsaid extension to move from one to the other side of the axis of said lever, means, substantially such as described, for inducing in said extensions sufficient magnetism to actuate the same, and a unison device controlled by said lever.

7. The combination, substantially as hereinbefore set forth, with a permanent magnet and an armature normally polarized thereby, of two electro-magnets for actuating said polarized armature, a lever or rocker of soft iron applied to said polarized armature, which lever or rocker is centrally pivoted and located, as described, whereby the polarized armature is caused to present its extremities thereto upon opposite sides of its axis, a unison device actuated by said lever or rocker, and a yielding spring applied to said auxiliary armature, whereby it is normally held in one or the other of two positions.

8. The combination, substantially as hereinbefore set forth, withapermancnt magnet and an armature normally polarized thereby, of two electro-magnets for actuating said armature, a lever or rocker of soft iron applied to said polarized armature, which lever or rocker is centrally pivoted and located, as described, whereby the polarized armature is caused to present its extremities thereto alternately upon opposite sides of its axis, a unison device actuated by said lever or rocker, `and stops for limiting the movements of said lever or rocker. 4o

In testimony whereof' I have hereunto subscribed my name this 26th day of June, A. D. 188i.

HENRY VAN HOEVENBERGH. U1.

Witnesses:

DANL. W. EDGECOMB, CHARLEs A. TERRY. 

